Added tests and updated requirements with mock lib.

requirements.txt

@@ -1 +1,2 @@
 redis
+mock

tests/__init__.py

@@ -1,4 +1,5 @@
 import logging
+import mock
 from rq.compat import is_python_version
 if is_python_version((2, 7), (3, 2)):
     import unittest

tests/test_decorator.py

@@ -1,4 +1,6 @@
-from tests import RQTestCase
+from redis import StrictRedis
+
+from tests import RQTestCase, mock
 from tests.fixtures import decorated_job
 
 from rq.decorators import job
@@ -70,3 +72,23 @@ class TestDecorator(RQTestCase):
         self.assertEqual(bar_job.dependency, foo_job)
 
         self.assertEqual(bar_job._dependency_id, foo_job.id)
+
+    @mock.patch('rq.decorators.resolve_connection')
+    def test_decorator_connection_laziness(self, resolve_connection):
+        """Ensure that job decorator resolve connection in `lazy` way """
+
+        resolve_connection.return_value = StrictRedis()
+
+        @job(queue='queue_name')
+        def foo():
+            return 'do something'
+
+        self.assertEqual(resolve_connection.call_count, 0)
+
+        foo()
+
+        self.assertEqual(resolve_connection.call_count, 0)
+
+        foo.delay()
+
+        self.assertEqual(resolve_connection.call_count, 1)